DNF replacing yum: fedup?

[Jan Zelený]

On 26. 1. 2015 at 17:52:36, Will Woods wrote:
> On Mon, 2015-01-26 at 13:26 -0800, Adam Williamson wrote:
> > I note the ReplaceYumWithDnf Change page:
> > 
> > https://fedoraproject.org/wiki/Changes/ReplaceYumWithDNF
> > 
> > says nothing about fedup. However, fedup uses yum:
> > 
> > [adamw at adam fedup (master %)]$ grep -R yum * | wc -l
> > 74
> > 
> > Has this been considered yet?
> 
> Oh sure. I consider lots of things. I am large, I contain multitudes.
> 
> > Should porting fedup to dnf be in the scope of this Change?
> 
> If you want upgrades to work without yum, yes.
> 
> > Does that affect its practicability for F22?
> 
> That depends on how much help you expect to be able to find for that
> porting effort, since I haven't ever worked with DNF.
> 
> It's not actually that complicated; 90% of what fedup does with yum
> would be equivalent to a DNF command like:
> 
>   dnf --releasever=22 upgrade --testonly \
>       --pkglist=/var/lib/system-upgrade/package.list
> 
> which would:
> 
>   * download (and verify) updates for all packages using the F22 repos,
>   * run a test transaction of those updates, and report errors, and
>   * write a list of packages used in the update to the named file[1].
> 
> After that, you'd just need something like a 'treeinfo' command[2] that
> could handle a command line:
> 
>   dnf --releasever=22 treeinfo download kernel upgrade.img
> 
> Which would:
> * download .treeinfo.signed from the configured repo(s)
> * verify it using the RPM trusted key(s)[3]
> * use that to download/verify the items listed (kernel, upgrade.img)
> 
> That's about it. Everything else is outside the scope of dnf.
> 
> (As an aside, PackageKit should also support these operations, so we can
> use PackageKit to make a Upgrade GUI Thing.)
> 
> If anyone from the DNF/PackageKit teams wants to talk more about getting
> these things working, I'm happy to discuss the requirements in more
> detail. I'll also be at DevConf in Brno next weekend if anyone wants to
> discuss it in person.
> 
> -w
> 
> [1] This is so that upgrade.img knows which packages to install after we
> reboot. Alternately we'd just need a guarantee that every RPM file under
> $SOMEDIR is part of the upgrade transaction, and then fedup could
> construct package.list itself.
> [2] For more information about .treeinfo, see
> https://github.com/wgwoods/fedup/blob/master/fedup/treeinfo.py
> [3] The F22 key(s) get automatically trusted during the process of
> verifying the F22 packages, so after that you can verify F22 stuff
> against the RPM keyring.


CCing Michael Mraka who is handling migration of 3rd party tools from yum to 
dnf. I'm also interested in meeting you at DevConf, but let's arrange that off 
list.

Thanks
Jan